Two Supreme Court decisions have been handed down from on-high by the great, wise, robed-ones. On one hand, I'm disappointed that racial discrimination was found acceptable in theory by a majority of justices, but on the other hand I'm pleased that it appears that a large part of their justification rests on the states' roles as "laboratories for experimentation to devise various solutions where the best solution is far from clear."
For a democracy to survive, it's essential that every individual be treated equally under the law. Each citizen gets one vote, regardless of race, gender, religion, appearance, political affiliation, &c. I find it hard to believe that the Supreme Court would approve of a policy aimed at building a "critical mass" of Senators, Representatives, or Justices of certain races or religions -- but apparently the interest of the government in "promoting [racial] diversity" is compelling enough to affect universities.
It's good to give states the freedom to experiment with law and policy, and I understand the Court's deference to such a principle. However, I believe the time for such experimentation on thsi issue ended when the 14th Amendment was ratified by 28 out of 37 states in 1868. Sure, it took some of the rest of the states a little while longer to catch up (Kentucky ratified it in 1976), but I'm pretty sure everyone is on board by now.